High-temperature wood silicification: constraints from fluid and carbonaceous inclusions in quartz from Qitai, NW China
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Le résumé fourni par la source
Silicified wood serves as a crucial geological archive, recording significant information about palaeoenvironment, palaeoecology, palaeontology and diagenetic conditions. However, temperature and pressure conditions of silicification remain poorly constrained. In this study, we analysed primary fluid and carbonaceous material inclusions in quartz from silicified wood in the Qitai Silicified Forest, Xinjiang. Microthermometry and Raman spectroscopic studies reveal the methane-bearing silicification fluids, with salinities of 12.05–14.87 wt% NaCl equiv., densities ranging from 0.94 to 0.96 g/cm 3 , homogenization temperatures in the range of 238–257 °C, and provide the converting temperatures of 285 ± 30 °C for carbonaceous inclusions. Silicification temperatures are constrained to 238–315 °C, supported by successive silica precipitation. The thermal model analysis of inclusion isochores and thermobaric gradients, burial history of the Junggar Basin, and the presence of volcanic tuff hosting silicified wood limit the silicification pressure in the range between 0.1 MPa (surface conditions) and ~ 50 MPa. These findings provide the first quantitative P–T constraints on wood fossilization, revisit its thermal limits, and facilitate the study of wood fossil genesis in volcanic environments globally. Quantifying the P–T thresholds of wood silicification not only renews models of plant fossil preservation but also provides insights into how forest fossils reflect extreme palaeoenvironments.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- High-temperature wood silicification: constraints from fluid and carbonaceous inclusions in quartz from Qitai, NW China
- Date Crossref
- 02/12/2025
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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China University of Geosciences (Beijing) State Key Laboratory of Geological Processes and Mineral Resources pays non établi dans la noticeUniversité ou école supérieure
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Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute pays non établi dans la noticeOrganisme public
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China Science and Technology Publishing & Media pays non établi dans la noticeInstitution
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Johannes Gutenberg University Mainz Institute for Geosciences pays non établi dans la noticeUniversité ou école supérieure
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Xinjiang Uygur Autonomous Region Production Quality Supervision and Inspection Institute pays non établi dans la noticeStructure de recherche
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Ltd. Youke Publishing Co. pays non établi dans la noticeEntreprise
State Key Laboratory of Geological Processes and Mineral Resources — China University of Geosciences (Beijing), Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute et China Science and Technology Publishing & Media, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.